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FightIQ · UFC stats · UFC knockout rate by referee

UFC knockout rate by referee

Across the UFC record, the knockout rate is highest under Gary Copeland at 41% (51 fights) and lowest under Jacob Montalvo at 25% (79 fights).

How often a UFC fight ends in a knockout — the number itself, not a highlight reel, every bout on the official record since 1994.
Computed from 7,357 fights · 30 referees · updated 14 October 2026
Knockout rate by referee30 bars. Highest: Gary Copeland at 41% from 51 fights. The table below carries every value.Herb DeanHerb Dean: 36% (1,258 fights)36%John McCarthyJohn McCarthy: 40% (622 fights)40%Marc GoddardMarc Goddard: 33% (619 fights)33%Dan MiragliottaDan Miragliotta: 39% (498 fights)39%Jason HerzogJason Herzog: 33% (482 fights)33%Mark SmithMark Smith: 34% (460 fights)34%Chris TognoniChris Tognoni: 30% (459 fights)30%Keith PetersonKeith Peterson: 30% (405 fights)30%Mario YamasakiMario Yamasaki: 34% (388 fights)34%Yves LavigneYves Lavigne: 30% (264 fights)30%Mike BeltranMike Beltran: 34% (210 fights)34%Steve MazzagattiSteve Mazzagatti: 35% (199 fights)35%Leon RobertsLeon Roberts: 33% (193 fights)33%Kerry HatleyKerry Hatley: 33% (166 fights)33%Josh RosenthalJosh Rosenthal: 28% (120 fights)28%Kevin MacDonaldKevin MacDonald: 33% (109 fights)33%Jerin ValelJerin Valel: 29% (91 fights)29%Steve PercevalSteve Perceval: 32% (90 fights)32%Jacob MontalvoJacob Montalvo: 25% (79 fights)25%John SharpJohn Sharp: 26% (76 fights)26%Rich MitchellRich Mitchell: 26% (76 fights)26%Lukasz BosackiLukasz Bosacki: 30% (73 fights)30%Kevin MulhallKevin Mulhall: 35% (60 fights)35%Daniel MovahediDaniel Movahedi: 29% (59 fights)29%Blake GriceBlake Grice: 30% (57 fights)30%Osiris MaiaOsiris Maia: 32% (56 fights)32%Gary CopelandGary Copeland: 41% (51 fights)41%Kevin SatakiKevin Sataki: 38% (48 fights)38%Todd Ronald AndersonTodd Ronald Anderson: 33% (45 fights)33%Neil HallNeil Hall: 30% (44 fights)30%
Knockout rate by referee · every value is in the table below, with the number of fights behind it.
RefereeKnockout rateKnockoutsFights
Herb Dean36%4551,258
John McCarthy40%248622
Marc Goddard33%206619
Dan Miragliotta39%192498
Jason Herzog33%157482
Mark Smith34%156460
Chris Tognoni30%137459
Keith Peterson30%122405
Mario Yamasaki34%132388
Yves Lavigne30%80264
Mike Beltran34%71210
Steve Mazzagatti35%69199
Leon Roberts33%64193
Kerry Hatley33%55166
Josh Rosenthal28%34120
Kevin MacDonald33%36109
Jerin Valel29%2691
Steve Perceval32%2990
Jacob Montalvo25%2079
John Sharp26%2076
Rich Mitchell26%2076
Lukasz Bosacki30%2273
Kevin Mulhall35%2160
Daniel Movahedi29%1759
Blake Grice30%1757
Osiris Maia32%1856
Gary Copeland41%2151
Kevin Sataki38%1848
Todd Ronald Anderson33%1545
Neil Hall30%1344
What counts. A knockout here is any bout the official record ends by KO/TKO, including a doctor’s stoppage, which UFCStats files as its own method. A fight is a UFC bout on the official record with a result. Draws, no-contests and overturned results are excluded from every count on this page; disqualifications and could-not-continues are counted as fights, which is why the knockout, submission and decision shares do not add up to 100%. How this table is cut. The 30 referees with the most UFC bouts on the official record. A referee does not choose the assignments, so these are differences in the fights each one was given as much as in how each one calls them. 1,403 fights are outside this table. They were officiated by somebody outside those 30, or carry no referee on the record. They are not missing from our record — they are on the year-by-year archive like every other bout; there is simply no row here for them to sit in. Check us. Every number here is recomputed from the official UFC statistical record on each build — nothing on this page is typed in by hand. Search every fight to filter the same record yourself, or start from the year-by-year archive.
Knockout rate — cut another way
Other UFC stat answers